DE3138685A1 - METHOD AND DEVICE FOR PACKING LONG-STRETCHED CYLINDRICAL OBJECTS, IN PARTICULAR SAUSAGE BULLETS IN HOSE-SHAPED, ELASTICALLY EXPANDABLE PACKAGING MATERIAL - Google Patents

Description

Patent attorneys
Dipl.-Ing. W. Beyer
Dipl.-Wirtsch.-Ing. B. Jocham

6000 Frankfurt / Main Staufenstrasse 36

Note: Mr. Günter Kollross

At Wallerstädter Weg 2o

6080 Gross Gerau-Dornheim

Designation: Method and device for packaging elongated items cylindrical objects, especially sausage casing caterpillars in tubular, elastically expandable packaging material.

313868

«Κ ft" "·.

description

The invention relates to a method for packaging elongated items cylindrical objects, in particular sausage casings = caterpillars, in tubulara, elastically expandable packaging material, which in the unexpanded state has a smaller diameter than the objects to be packaged and is available as a strand of any length, as well as a Device for carrying out the method concerned by the invention.

There is a desire to enclose elongated, cylindrical objects in tubular packaging material especially when it comes to delivering meat to the meat processing industry Industry with ready-made sausage casing material for further processing on automatic filling machines. The casing material produced by the hose factories as an artificial product is gathered in lengths of several 10 meters into relatively short tubular caterpillars that are placed on the filling pipe of the sausage manufacturer Filling machine pushed on and then filled with sausage meat while continuously pulling the material off the caterpillar will. Both when shirring and when stuffing, the casing material must achieve the required suppleness have a fairly high moisture content which, in many types of materials, allows for the rapid growth of Bacteria favored. For such materials, therefore, to avoid the hitherto customary intermediate drying, a sterile packaging after bactericidal treatment after the manufacture of the tube is desirable. Besides that, there is Need for the tubular caterpillars to open their folds automatically during transport and storage prevent what is also possible with net packaging. In general, however, the packaging material should enclose the caterpillars so tightly that that when processing on the automatic filling machine, the material is peeled off exactly fold by fold and

3138665

this avoids congestion in front of the so-called casing brake, through which the casing material at the filler neck end runs will. For this, however, it is necessary that the packaging material is elastically expandable and in the unexpanded state has a smaller diameter than the caterpillars to be packaged. The application of such packaging material on the caterpillars to be packaged could not be solved satisfactorily so far.

The object of the invention is therefore to provide a method of Initially. ', mentioned type as well as one for the implementation of the same to create suitable device that is quick and easy however, the packaging of elongated cylindrical objects such as, in particular, sausage casing caterpillars, is damage-free in elastically expandable hose material with a smaller resting diameter than the objects to be packaged

The inventive method for solving this problem is characterized by the fact that, in continued cyclical repetition, at least the packaging length of one The corresponding section of the packaging material has a larger diameter than the objects to be packaged is expanded and then such an object while gripping an unexpanded end portion of the packaging material and then relatively pulling off the expanded material section from the expansion area the packaging material is moved through until the object is completely enveloped, and in addition in the For each such process cycle, run the packaging material is separated from the material strand in the length required for the packaging of the item.

The packaging material can be expanded mechanically or pneumatically. It is, if caterpillars, in particular sausage casing caterpillars are packed

- -Γό -

should, in any case, be advantageous to axially compress the tubular caterpillars before being wrapped in the packaging material.

A device for carrying out the method with mechanical expansion of the packaging material is preferably characterized by a support device for in each case one object to be packaged, a number of elongated sliders arranged around the support device and movable relative to this in the longitudinal direction of the object for a material section required for packaging, a the elongated members at the one end supporting spreading mechanism for radially spreading apart the elongated members as well as devices for pulling the packaging material onto the unspread members and for cutting the pulled material section from the material strand after the spreading.

In contrast, a device for implementation is characterized of the method according to the invention with pneumatic expansion of the packaging material preferably from by a the packaging material after passing through a pair of squeezing rollers over it, over the packaging material Guide ~ centered from the outside and held against axial movement in the direction of flow of the packaging material Tube with a slightly larger inner diameter than the objects to be packaged and an object to be packaged, which can be retracted into the guide tube Support tube through which compressed air to such an extent into the interior during the entry into the guide tube of the packaging material which lies against the end face of the object to be packaged in a sealing manner with its opening end is blown in that this expands beyond the outer diameter of the guide tube and by itself when the shirring pipe is retracted further

the front edge of the guide tube runs on the object to be packaged enveloping it.

Further features for the advantageous configuration of both the method according to the invention and the devices its implementation result from the subclaims and the following description of two in the drawing illustrated embodiments. Show it:

Fig. 1: in a schematic representation the

Basic structure of a shirring machine for tubular sausage casings with a mechanically operating packaging device according to the invention in plan view and partially in section, the supply rolls for the sausage casing material and the packaging material and further details on their processing have been pivoted into the plane of the drawing for reasons of illustration _f

Fig. 2: the front view of one of the Ver

packing device arranged abutment for pressing the tubular caterpillars before packing,

Fig. 3: a cross section through a guide

and clamping device for feeding the packaging material,

4: in a perspective illustration the

Working side of a device for gathering the packaging material,

Fig «5s in a perspective view

Rear of the gathering device according to FIG. 4,

6s shows the front view of a spreading device

for the packaging material,

Fig. 7: an axial section through the Spreizein

direction according to VII-VII in Fig. 6,

Fig »8ϊ the front view of a holding and peeling

device for the stop sleeves on the shirring pipes,

9s shows an external view of the holding and peeling

device according to Fig. 8,

Fig »1os the front view of a receiving and Ab

laying device for the packaged hose caterpillars,

Fig. 11; a schematic representation of a pre

direction for the pneumatic packaging of hollow cylindrical objects during the packaging process and

FIG. 12 shows the same representation as in FIG. 11

during the separation process,

- yS -

The shirring machine with packaging device shown schematically in plan view and partially in horizontal section in FIG carries on a substantially rectangular machine bed 1o two guide rods 12 on which a turret slide 14 by means of a hydraulic power cylinder 16 between an advanced position shown in the figure and a to the right of it, the withdrawn position can be displaced in a controlled manner. The turret pour 12 stores one by one horizontal axis rotatable and by means of a (not shown) switching drive by 180 ° up and down turret disk 18 / on which two diametrically opposite to the Axis of rotation elongated parallel shirring tubes 2o are attached overhung. By switching the turret disk forwards and backwards 12, the shirring pipes 2o are alternately in a shirring position A. or a packaging position B brought.

In the gathering position A, the gathering pipe 2o forms part of a gathering device, denoted overall by 22, for the one Tubular sausage casing material 26 coming from the supply roll 24, which in sections in the gathering device 22 forms into sticks 28 gathered, separated from the material strand and after switching the turret disk 12 into the packaging position B by a there in its entirety with 3o designated packaging device in one of a supply roll 32 above the machine upcoming tubular packaging material 34 included and is filed.

The gathering device 22 has, in a known manner, a pair of nip rollers 36, two pairs of driven preferred rollers 38 and a shirring tool, which consists for example of two or more driven toothed rollers 4o. The toothed rollers 4o push the casing material 26 fed to them by the feed rollers 38 against a stop sleeve, forming circumferential folds 42f which sits displaceably on the shirring tube 2o and with the entire turret assembly by controlled extension of the

Power cylinder 14 corresponding to the increasing length of the thereby formed caterpillar 28 from the left position shown backs away. When the desired track length is reached, moves the turret assembly completely back into the right end position, the shirring pipe 2o leaves the shirring tool 4o and releases a gap in which the knives are then one Cutting device 44 enter and separate the bead 28 from the material strand 26. The turret disk 18 be switched by 180 ° to move the shirring pipe 2o loaded with the tubular caterpillar 28 from the shirring position A into the packaging position B and at the same time the empty one at this point in time to pivot other shirring tube into shirring position A? in which moves the turret assembly in rapid traverse back to the left starting position for the start of a new gathering process O

During the process of the turret assembly, the on her shirring tube brought into the packaging position B. 28 axially pressed together by the stop sleeve 42 against a press abutment 46 (FIGS. 1 and 2) which has been brought into the operative position and then, while a new stick is being made on the other shirring tube, into a partitioned section of the packaging material 34 included, in the retracted position of the turret assembly sideways from the packaging device taken out and - if necessary after closing the packaging ends - put down.

The press abutment 46 shown in detail in Fig. 2 consists of a on the top of the machine · betts 1o attached bracket 48, on which mirror images one above the other two stop levers 5o are articulated. A gear pair 52, indicated only by the partial circles, couples the two stop levers 5o such that they are opposite to each other between a stop position shown with solid lines and a release position shown in dashed lines can be pivoted. A force is used to swivel

ν; ^: - = - Π ^: :: = - 'θ! =? 138685

cylinder 54, the housing of which is attached to a bracket 56 on the bracket 48 is articulated and the piston rod 58 articulated one arm of an angle lever 6o mounted on the bracket 48, whose the other arm is coupled to the upper stop lever 5o via a coupling 62. The power cylinder 54 is preferably a double-acting compressed air cylinder that supports the press abutment 46 opens when extending and closes when retracting. Grasp in the closed position (shown with solid lines) the stop lever 5o with their recesses 64 complementing each other to form a circular cross-section, the shirring pipe 2o and form with it lateral coverings 66 made of plastic or other suitable material, an abutment for the one located on the shirring pipe Hose caterpillar 28, through which this when moving the turret assembly while being carried by the stop sleeve 42 is compressed. The press abutment is then placed 46 opened again by extending the power cylinder 54 to make room for packing.

The subsequent packaging of the pressed tubular caterpillar 28 in the packaging material 34 takes place by shirring a part this material on an expanding mandrel, expanding the gathered material with the aid of the expanding mandrel, separating it the gathered material from the rest of the strand of material, pulling away the gathered material with the aid of the spreading device via the tubular caterpillar and finally the sideways pivoting away and laying down of the packaged caterpillar, where appropriate known clip devices (not shown) are used to close the packaging ends with metal clips can be.

The facilities for the mechanized implementation of this packaging and the discarding process are shown in FIG

- a guide and clamping device 68,

- a gathering device 7o,

- a spreading device 72

- a separating device 74,

- a holding and pulling device 76 for the stop sleeve 42 "

- a receiving and depositing device 78 as well as = ■ a length measuring device 8o "

The packaging material wound flat on the supply roll 32, Both a closed tube made of plastic film and a mesh material that can be expanded in the circumferential direction can be, runs over a pulley 82 to the guide and clamping device 68, in which there is a floating guide tube 84 is drawn, which comes flat from the supply roll 24 packaging material brings its round cross-section. As FIG. 3 shows, the guide tube 84 is over inside the guide clamping device 68 the packaging material running over it between two successive sets of four guide rollers 86 in each case Position held. The guide and clamping device 68 has a support bracket 88 on which two carriages 9o, 92 are placed one above the other are arranged vertically displaceable. The carriages 9o, 92 contain aligned threaded bores with opposing ones Gradients in which a threaded spindle 94, which is axially immovable in the support bracket 88, rotates in opposite directions Threaded sections 96, 98 engages »The carriage 9o, carry horizontal brackets 1oo or 1o2 with an inner and an outer elongated hole 1o4 or »1o6, through which Fastening screws 1o8 extend for one bearing block 11o each. Each bearing block 11o supports two spaced apart one behind the other Guide rollers 86. By loosening the fastening screws 1οθ and turning the threaded spindle 94 on their the top end with a square can set the height and

3138665

- yi -

the lateral position of the guide tube 84 can be precisely adjusted, and it is also an exchange of the guide tube for such a thing with smaller or larger diameter for adaptation to other calibers of the tubular caterpillars 28 to be packaged possible.

The upper arm 1oo of the guide and clamping device 6 8 carries a U-shaped support 112 on which a double-acting pneumatic clamping cylinder 1o4 is attached. The downwardly directed piston rod 116 of the clamping cylinder 112 extends through a hole in the upper boom 1oo and carries a clamping shoe 118 at the end, which by pressing the Clamping cylinder 114 against the guide tube 84 with the above extending packaging material 34 is adjustable to hold the guide tube and packaging material against axial movement. To release the clamping, the clamping cylinder 114 is reversed Direction actuated.

The packaging material 34 running over the guide tube 84 is grasped by the gathering device 7o and gathered onto the receiving jaws of the spreading device 72 which form a mandrel 12o (FIG. 1). In this case, the mandrel is carried along by 12o that this packaging material during shirring the same time serves as a stop for the guide tube 5o to prevent _c.

The gathering device 7o has, as FIGS. 4 and 5 show, a U-shaped support frame 122, which by means of a (not shown) stand on the machine bed Io next to the guide and Clamping device 68 is attached. Between the legs of the support frame 122, two guide rods 124 extend one above the other, on which a U-shaped carriage 126 means Liners 128 displaceably mounted 1st. The rifles 128 are preferably made of plastic and exert a slight braking effect on the slide for reasons mentioned later 126 off. The carriage 126 is to a horizontal longitudinal center plane symmetrically constructed and rests on its web part

two superposed shafts 13o _p which are coupled to the inside of the carriage 126 by a gear pair 122 rotatably in opposite directions to one another. The shafts 13o also each carry a crank arm 134, the crank pins of which engage in the lower or upper elongated hole 136 of a cross member 138. A double-acting power cylinder 14o, which is preferably a compressed air cylinder, is fastened to one leg wall of the support frame 122 with its housing and is hinged with its piston rod 122 to the cross member 138 in the center thereof each have a non-rotatable connection with a stop lever 144 and a gripper lever 46 in front of it. At the outer ends of the gripper levers 146, gripper jaws 148 extending transversely thereto are detachably and thus interchangeable in size, which are semicircular and are provided with friction linings 15o on the inside. The two gripper jaws 148 thus form, as it were, tongs that can be opened or closed by pivoting the gripper levers 146 in opposite directions, the gripper jaws 148 complementing each other in the closed position to form a circular ring, the inner diameter of which corresponds to the outer diameter of the guide tube 84. The opening and closing movements of the gripper jaws 148 are limited by the stop levers 144, which can be pivoted between adjustable stop screws 152, 154 on the slide 126.

When the power cylinder I4o in one direction or another is pressurized with pressure medium, preferably compressed air, the piston rod 142 will first try to move over the crossbeam 138 to pivot the crank arms 134 and to rotate the shafts 13o in opposite directions to one another until the stop lever 144 of one or the other stop screws 152 or 154 are intercepted. As a result, the gripper jaws 148 formed pliers, depending on whether the piston rod 142 extends or retracts, closed or open, the liners 128

'■ -' '3138665

by the frictional engagement on the guide rods 124 by the Shafts 13o transmitted to the carriage 126 reaction force exerted on the support frame 122 and prevent at this switching movement of the gripper jaws 148 moves the carriage. Only when the stop lever 142 of the corresponding Stop screws 152 and 154 are intercepted, the frictional engagement the bushings 128 overcome, and the carriage is with the closed or open gripper jaws moved along the guide rods 144 over the remaining stroke length of the power cylinder 14o.

It is obvious that when the power cylinder 14o is then reversed, the gripper jaws 148 are first again theirs Change position and only then the carriage 126 is moved in the opposite direction. The inside fillets of the Gripper jaws 148 with the friction linings arranged therein are, as already mentioned, adapted to the outer diameter of the guide tube 84, so that the gripper jaws 148 are closed State of the running over the guide tube 84 packaging material 34 frictionally grasp and on the mandrel 118 of the spreading device 72, while in the open state it freely over the packaging material into the Slide back from the starting position. Since the gripper jaws 148 are releasably attached to the levers 146, they can when changed of the packaging cross-section can be easily exchanged.

The spreading device 72 shown in Figures 6 and 7 has a carriage 156 which is on the machine bed 1o attached rod guide 158 by means of a (not shown) arranged in the lower area of the machine bed reversible electric motor can be moved back and forth via a chain drive 116. The carriage 156 carries an upright plate 162 with a circular central opening, the center of which lies on the axis of the shirring tube 2o located in the packaging position. One attached to plate 162

- 2ο- -

star-shaped guide frame 166 forms radial tracks for four slides 168 distributed around the opening 164, each of which has an axially extending tubular segment-shaped Carrying the receiving jaw 17o. The receiving jaws 17o complement each other in the radially inner end positions of the slide 168 to form the mentioned mandrel 118, which in this position has the same outer diameter as the guide tube 84 has “The receiving jaws 17o are on the outsides with a sliding layer 172, preferably provided with a film made of polytetrafluoroethylene and can be adjusted by releasing the guide frame 166 against those with smaller or larger receiving jaws other packaging diameters can be exchanged. The angled outer ends 174 of slides 168 become single-acting hydraulic power cylinders from the piston rods detected, which are attached to the guide frame 166 and connected to a ring line 178. The ring line 178 can Hydraulic fluid is supplied via a flexible line 18o through which the slide 168 with the receiving jaws 17o attached thereto radially outwards into a spreading position are displaceable against the action of return springs 182 * In the spread position, the receiving jaws 17o circumscribe a larger diameter than the objects to be packaged and can be moved by moving the carriage 156 with the help of the Electrically operated chain drive 16o moved over the hose caterpillar 28 located in the packaging position B. will.

The separating device 74 can be formed in a known manner by a filament 184 (FIG. 1) which is electrically heated in the State is passed through the packaging material by means of a power cylinder 186 after the Spreading device 72 on the slide guide 158 slightly from the guide tube clamped by the clamping cylinder 114 84 has been moved away.

^ί->: 3136685

The holding and pulling device 76 shown in more detail in FIGS. 8 and 8 has a relatively wide one Stand 19o on, the one on the machine bed 1o near the rear End of the rod guide 124 is attached. The stand 19o has an upright support plate 192, one above the other carries two horizontal guide rods 194 on which a carriage 196 is displaceable along the shirring pipe 2o. To the Carriages 196 are mounted in bearing blocks 198, two claw levers 2oo, in a game-like manner to one another, and by a pair of gears 2o2 coupled to pivot in opposite directions. A lever 2o4 connected to the lower claw lever 2oo in a rotationally fixed manner is on the piston rod of a power cylinder 2o6, the housing of which is pivotably held in a fork piece 2o8 on the slide 196 is »The ends of the claw levers 2oo preferably carry flat claws 21o made of plastic End faces are rounded. The stop sleeves 82 which are displaceable on the shirring tubes 2o and which have a greater length than the receiving jaws 17o contain near their rear ends of annular grooves 11 2, in which the claws 2-Io play-free can be swiveled in. In this way it is possible to remove the packaging position To fix the stop sleeve 82 on the slide 196 of the holding and pulling device 76.

The support plate 192 of the holding and pulling device 76 is between the guide rods 194 with an elongated Opening 214 is provided through which a shoulder on the carriage 196 extends. At the approach 216 is on the Outside of the support plate 192 (Fig. 9) mounted on one leg of a toggle lever, the other leg 22o on the Support plate 192 is mounted. A power cylinder 224 pivotably attached to the support plate 192 on a bracket 222 detects with its piston rod 226 a lever 228 which can be pivoted together with the toggle lever arm 22o. By When the piston rod 226 is retracted and extended, the toggle lever 228, 22o is thus stretched or buckled, and the slide 196

- -2-2 -

moved with the claw levers 21o on the guide rods 194 along the shirring pipe 2o.

The holding and pulling device 76 is arranged at such a location on the machine bed 1o that the claws 21o Claw lever 2oo with extended toggle lever 218, 22o engage in the annular groove 212 of the stop sleeve 42 when the Revolver arrangement in the starting position at the beginning of the gathering process, i.e. the left end position in Fig. 1 moved forward is. The claws 21o are detachably attached to the claw levers 2oo and can therefore be easily replaced, when the shirring pipes 2o with the stop sleeves 42 slidable thereon for adaptation to others to be shirred Sausage casing caliber can be exchanged.

The receiving and depositing device 78 has, according to FIG. 1, a towering stand 23o fastened to the machine bed 1o, at the upper end of which a rocker 232 extending laterally downward is articulated. The rocker 232 carries at the lower end a bearing bracket 234 _f on which two lever arms 244 are mounted, each of which carries an elongated half-shell 238. The lever arms 244 are coupled to one another by a pair of gears 24o indicated only by the partial circles and can be pivoted by means of a preferably pneumatic power cylinder 242 via a lever arm 248 attached to the upper lever 236 between the closed position shown in solid lines in FIG. 1o and an open position shown in dashed lines . The rocker. 2 32 is furthermore by means of a further pneumatic power cylinder 246 via a lever arm 248 attached to the upper end of the rocker between a receiving position shown with solid lines, in which the closed half-shells 238 grasp a hose caterpillar located on the shirring pipe 2o, which will be explained in more detail later. and a stowage position shown in dashed lines can be pivoted.

- -2-3 -

In the latter position, before the half-shells 238 are opened, the ends of the packaging can be clipped by means of (not shown) known clip devices.

At the ends facing the stop sleeve 42, the half-shells 238 have circumferential collars directed radially inward 25o provided that when closing the half-shells between the end of the tubular caterpillar 28 and the end face of the Ability to penetrate stop sleeve 42 in a manner described later.

Finally, according to FIG. 1, the length measuring device consists of a spring (not shown) against the still flat one Packaging sleeve 34 pressed on in the area of the deflecting roller 82 Sensing roller 252, which from the packaging material 34 frictionally is taken and rotates a toothed disk 254 made of magnetic material, which is scanned by a transducer 256 will. The electrical pulses generated by the scanning of the toothed disk 254 by the transducer 256 are in a (not shown) electronic counting device counted and compared with a target value, which is the packaging length for a hose caterpillar 28 corresponds. The counting device starts to count as soon as the gathering device 7o is switched on will. As soon as the number of pulses counted corresponds to the setpoint value, the gathering device 7o is switched off and returns from any intermediate position by opening the gripper jaws 148 into the starting position above the guide tube 84 back.

The packaging device described above works as follows:

It is assumed that the spreader 72 on the rod guide 158 have assumed their front end position, in which the receiving jaws 17o forming the mandrel 12o in unspread State on the face against the guide tube 84 of the guide

and clamping device 68 abut, the gathering device 7o is located in the starting position? in which the gripper jaws 148, as indicated in FIG. 1, are above the end of the guide tube 84. This position can already be taken before the turret disk 18 is switched to a loaded in the gathering position A with a new hose caterpillar 28 To pivot the guide tube 2o into the packaging position B.

In the aforementioned position, the gathering device 7o can be switched on regardless of the switching of the turret disk 18 and the advance of the turret arrangement into the position shown in FIG. The gathering device 7o detected by alternately operating the power cylinder 14o in forward and backward direction, the extending above the guide tube 84 packing material 34 and pushes with each forward movement of a the stroke of the power cylinder 14o corresponding length on the mandrel 12O <- ^au ^ similar Thus a caterpillar 258 the bead 28 is formed as it is generated by the gathering device 22 on the guide tube 2o in the gathering position A »

The material withdrawal required to form the bead 258 from the supply roll 32 is transferred to the feeler roll 252 and with the help of the tooth lock washer 254 and the transducer 256 in Converted pulses, which are fed to the aforementioned electronic counter. Once the number of counted Pulses coincides with the setpoint stored there, the power cylinder 14o of the gathering device 7o is made of any Intermediate position switched off and the gripper lever 146 returned to the starting position via the guide tube 84.

In the meantime, the turret device has enough time to switch over the turret disk 18 and to advance the Shirring pipes in the position shown in Fig. 1, wherein the press abutment 46 is closed and the packaging position B

located sausage casing caterpillar 28 is compressed. As soon the turret arrangement has reached its front end position, closes the holding and pulling device 76, its carriage 196 in the extended toggle lever 218, 22o in the left end position stands, and the claws 21o engage in the annular groove 212 of the stop sleeve 42 a. Furthermore, the press abutment 46 opens, the clamping cylinder 114 is actuated in the clamping direction, so that the Clamping shoe 118 clamps the guide tube 84 with the packaging material 34 running over it, and the receiving jaws 17o with the caterpillar 25 8 located thereon are spread by actuating the hydraulic power cylinders 176. Thereupon the electric motor for the chain drive 16o is switched on briefly, so that the carriage 156 with the spreading device 72 moves away from the guide tube 84 by a few centimeters. The filament 184 of the separating device 74 can now be switched on heated to a corresponding power source and by actuating the power cylinder 186 through the gap between the Guide tube 84 and the receiving jaws 17o passed through whereby it separates the bead 258 on the spreading device 72 from the remaining packaging material 34. The filament 184 is guided directly past the guide tube 84, while the front ends of the receiving jaws 17o a relatively have a large distance to the path of the filament184, so that a section of material several centimeters long protrudes over the ends of the receiving jaws 17o and due to the elasticity of the packaging material is narrowed back to its resting diameter.

In the meantime, the gathering device 22 for the sausage casing material have been turned on, and the turret assembly move the guide tubes 2o slowly to the right in FIG. 1 by extending the hydraulic power cylinder 16. Since the claws 21o of the holding and pulling device, the stop sleeve 42 on the shirring tube 2o located in the packaging position B, take this stop sleeve and the one to be packaged Hose caterpillar 28 does not participate in this axial movement.

Now the electric motor for the chain drive is 16o again, namely switched on in rapid traverse and guides the spread receiving jaws 17o over the one to be packaged Caterpillar 2 8 away, with the shrunk protruding end of the packaging material caterpillar 258 at the front end the caterpillar 28 to be packaged is intercepted and then continuously further packaging material from the caterpillar 258 pulls off the spread receiving jaws 17o and thus envelops the caterpillar 28 to be packaged.

As soon as the spreading device 72 with the receiving jaws 17o has arrived above the stop sleeve 42, the rocker 232 of the receiving and depositing device 78 is pivoted by actuating the power cylinder 246 i 'and the half-shells 238 are closed by actuating the power cylinder 242. The collar-shaped ones penetrate Approaches 25o between the end of the caterpillar 28 and the stop sleeve 42. Then the power cylinder 224 of the holding and pulling device 76 is actuated and thereby the toggle lever 218, 22o is buckled, whereby the stop sleeve 42 moves out of the region of the receiving jaws 17o of the spreading device 72 to the right in FIG Is pulled out “Now the receiving jaws 17o by venting the hydraulic power cylinders 176 return to their unspread position under the action of the return springs 182, whereby the The remainder of the bead 258 still located on the receiving jaws 17o contracts. This is followed by reverse Actuation of the power cylinder 2 46 of the and depositing device 78, the rocker 232 pivoted outward, and the half-shells 238 bring the packaged Bead 28 from the packaging area into the deposition position shown in dashed lines in FIG. in which the half-shells - if necessary after the previous Sealing the ends of the packaging - open and put down the packed stick.

- 47 -: 2ft-

The claw levers 2oo of the holding and pulling device 76 are now opened, the toggle lever 218, 22o is stretched, and the spreading device 72 is moved back to the starting position via the chain drive 16o, in order to again packing material 34 for the next one by repeating the above-described process packing hose caterpillar 28 to take up. Simultaneously can the turret disk 18 in the retracted end position of the turret assembly, which is before pivoting out the packaged tubular caterpillar 28 with the aid of the and depositing device 78 must be reached must be switched over again.

The device described above is of course not applicable to a shirring machine " limited, but can also be set up separately, and to accommodate the tubular caterpillars to be packaged 28, instead of the shirring tubes 2o, massive rods can also be used, which are fitted with a suitable Slide assembly moved into the gathering device will.

In the pneumatic gathering device shown in FIG. 11, which is designated in its entirety by 26o, the coming from a (not shown) supply roll tubular packaging material 262 first between a pair of squeezing rollers 264 and then guided over a floating guide tube 266, this in a manner similar to the guide tube 84 of the mechanical packaging device described above may be centered between guide rollers 268 ". The guide tube 266 is on the one facing away from the nip rollers 264 The end is provided with a radially projecting annular bead 27o, against which two or more are stationary supported stop rollers 272 are in contact.

2-β -

The item to be packaged 274, which in this device Must be hollow cylindrical and in turn can be a tubular caterpillar made of sausage casing material on a hollow cylindrical mandrel 276 in the guide tube 268, the inner diameter of which is slightly larger than the item to be packaged is retracted and grasps with the front end of the object 274 the front end of the extending over the annular bead 27o and again narrowing packaging material, which is sealingly applied to the object.

Compressed air is blown in through the mandrel 276 with the As a result, as soon as the object 274 to be packaged has grasped the packaging material 262 in a sealing manner, this is inflated and widens beyond the outer diameter of the guide tube 266. This can with the further penetration of the article to be packaged 274 into the guide tube 266 practically without Friction of further packaging material 262 through the nip roller 264 over the guide tube 266 which, after being deflected at the annular bead 27o on the object 274 to be packaged hangs up and increasingly envelops them.

The guide tube 266 is slightly longer than the item 274 to be packaged, which extends behind the annular bead 27o is retracted into the guide tube 266 (Fig. 12). The compressed air supply is then switched off through the mandrel 276, and a rotating knife arranged in an annular groove 278 of the mandrel 276 is rotated in a flattened manner is set and separates the packaging material behind the item to be packaged 274 from that via the Guide tube 266 and the annular bead 27o extending material strand, the end of the strand over the annular bead 27o protrudes out and is able to contract to its resting diameter. The packaged

Object 274 is pulled out from the guide tube 266 by the protruding strand end passes, to which a carrier device can (shown not) be disposed at the end of the mandrel 276, which prevents _r that the packaged object is caught by the projecting end of the strand.

Claims (1)

Claims .j Method for packing elongated cylindrical objects, in particular sausage casing caterpillars, in tubular packaging material _f elastically expandable, which in the unexpanded state has a smaller diameter than the objects to be packaged and is available as a strand of any length, characterized in that in continuous cyclical repetition a section of the packaging material corresponding at least to the packaging length of an object is expanded to a larger diameter than the objects to be packaged and then such an object is expanded by grasping an unexpanded end section of the packaging material and then pulling the expanded material section from the expansion area relatively through the packaging material up to is moved through to completely enclose the ^ object, in addition, in the course of each such process cycle, the packaging material in the fü The length required for the packaging of an object is separated from the material strand » 2. The method according to claim 1, characterized that the packaging material is mechanically expanded. 3 "The method according to claim 2, characterized in that the separation from the strand of material takes place after the expansion, but before the object is wrapped with the expanded packaging material. 4 "Method according to claim 2 or 3, characterized in that J: indicates that the packaging material% - in the length required for packaging before Expanding is gathered together axially. 5. The method according to claim 3 and 4, characterized that the severing to form the unexpanded end portion to be grasped by the object at a distance from the area of the widening. 6. The method according to claim 1, characterized that the packaging material is expanded pneumatically. 7. The method according to claim 6, characterized that the separation takes place after the object has been wrapped with the packaging material. 8 «Method according to one of the preceding claims for packing tubular caterpillars, in particular sausage casing caterpillars, characterized in that the tubular caterpillars are wrapped in the packaging material are axially compressed. 9. Device for performing the method according to one of claims 2 to 5 and / or 8, characterized by a carrying device (2o) for one object (28) to be packaged, a number all around the carrying device (2o) arranged and relative to this in the longitudinal direction of the object (28) moveable receiving members (17o) for one for packing required material section, a spreader mechanism supporting the receiving members (17o) at one end (168, 176) for radial spreading apart of the receiving members and devices (7o, 74) for Pulling the packaging material (34) onto the unexpanded receiving members (17o) and for separating the pulled material section from the material strand after spreading. 1o "Device according to claim 9, characterized that the receiving members of tubular segment-shaped jaws (I7o) are formed, which are in the unspread Complete the state to a cylindrical tube. 11 "Device according to claim 9 or 1o" characterized that the receiving members (17o) are coated with a sliding material (172). 12. The device according to claim 11, characterized in that the sliding material is a film (172) is made of tetrafluoroethylene, ο Device according to one of claims 9 to 12, characterized by a front of the receiving members (17o) within the packaging material (34) floating guide tube (84) for feeding the packaging material, centered on this from the outside to the pick-up links (17ο) .. 14. Apparatus according to claim 13, characterized that the guide tube (84) against axial displacement from the outside over the packaging material (34) can be clamped and the spreading mechanism (72; 168, 176) with the receiving members (17o) closes Creation of a separating gap after the packaging material has been pulled open, controlled axially from the clamped one Guide tube (84) can be moved away ", 15 «Device according to claim 14 _f, characterized in that the spreading mechanism (168, 176) on one in the longitudinal direction of the to be packaged Object (28) displaceable carriage (156) is arranged. 16 "Device according to claim 14 or 15 for packaging the Objects with hose material made of elastic plastic film, characterized in that that the separating device (74) is electrically heated by one which can be passed through the separating gap Glow wire (184) is formed. 17. Device according to one of claims 13 to ^, characterized characterized in that the pulling device (gathering device 7o) two at the same time each with a circumferential half of the packaging material (34) which can be brought into and out of engagement with a semicircular Has gripper jaws (148) which, after being engaged, in the pulling direction along the Female members (170) movable and disengaged can be moved back into their starting position on the guide tube (84). 18 "Device according to claim 17, characterized in that that the gripper jaws (148) are provided with friction linings (15o) in the area of engagement. 19 "Device according to claim 17 or 18, characterized characterized in that the length of the receiving members (17o) is a fraction of the length of the to objects (28) to be packaged and the gripper jaws (148) for pulling on the tubular material (34) on the receiving members (17o) can be moved back and forth several times with axial gathering. - 5th 2ο. Device according to one of claims 9 to 19 for Packaging of tubular casings gathered into sticks, in particular sausage casings, characterized in that the carrying device is of a when shirring the tubular casings (26) to be packaged, the shirring tube (2o) used is formed. 21 "Device according to claim 2o, characterized in that that the spreading mechanism (168, 176) with the one drawn onto the receiving members (17o) and expanded packaging material section lengthwise over that carried by the shirring tube (2o) Hose caterpillar (28) can be moved away " 22 »Device according to claim 21, characterized that the shirring tube (2o) to support the hose caterpillar (28) during the outward movement of the spread receiving members (17o) a stop member (42) of approximately the same diameter as the hose caterpillar (28) carries, over which the spread Receiving members (17o) can also be moved away and that at the end of this movement away from the area the receiving link (17o) can be pulled out » 23. The device according to claim 22, characterized that the stop member of a on the shirring tube (2o) displaceable stop sleeve (42) is formed, which by one after the end of the movement of the spread stop members (17o) axially displaceable pulling device can be taken along. 24ο Device according to claim 22 or 23, g e ken η draws by a pick-up and deposit device that grips the packaged tubular casing caterpillar (28) (78), 25. The device according to claim 24, characterized ι that the receiving and depositing device (74) has two elongated half-shells (238), of which the packaged ski caterpillar (28) can be detected and after removing the shirring tube (2o) laterally from the packaging device (3o ) is removable. 26. Device according to one of claims 21 to 25 g e by an abutment that can be temporarily swiveled or pushed into the displacement path of the tubular caterpillar (28) to be packaged for compressing the tubular caterpillar when the shirring pipe (2o) is retracted into the packaging device (3o). 27. Device for performing the method according to claim 6 or 7 for packaging hollow cylindrical Objects, characterized by the packaging material (262) after passing through a pair of squeezing rollers (2 64) leading over and over the packaging material outside centered and held against axial movement in the drainage direction guide tube (266) of slightly larger diameter than the items to be packaged (274) and one each to be packaged Object carrying / in the guide tube (266) retractable support tube (mandrel 276), through which during the retraction in the guide tube (266) compressed air to such an extent in the interior of himself with his opening end sealingly against the end face of the object (274) to be packaged can be blown in so that this expands beyond the outer diameter of the guide tube (266) and when the guide tube is retracted by itself over the front edge (27o) of the guide tube - 7 (266) runs down on the item to be packaged. 28. The device according to claim 27, characterized in that g e - ^ indicates that the leading edge of the Guide tube (266) carries an annular bead (27o) with a rounded cross section.